1220142001 has 8 divisors (see below), whose sum is σ = 1346048424. Its totient is φ = 1098814080.

The previous prime is 1220141983. The next prime is 1220142023. The reversal of 1220142001 is 1002410221.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33408400 + 1186733601 = 5780^2 + 34449^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220142001 - 2¹¹ = 1220139953 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220142031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1144066 + ... + 1145131.

It is an arithmetic number, because the mean of its divisors is an integer number (168256053).

Almost surely, 2^1220142001 is an apocalyptic number.

It is an amenable number.

1220142001 is a deficient number, since it is larger than the sum of its proper divisors (125906423).

1220142001 is a wasteful number, since it uses less digits than its factorization.

1220142001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289251.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220142001 is about 34930.5310724014. The cubic root of 1220142001 is about 1068.5711854504.

Adding to 1220142001 its reverse (1002410221), we get a palindrome (2222552222).

The spelling of 1220142001 in words is "one billion, two hundred twenty million, one hundred forty-two thousand, one".